package com.itec.learn.java.design.observer;

import java.util.Observable;
import java.util.Observer;

/**
 * @author chenyiqun
 */
public class MailObserver implements Observer {

    @Override
    public void update(Observable o, Object arg) {
        System.out.println("发送邮件的观察者已经被执行");
    }
}
